4.5 mile out-and-back trail. Halfway point is a beautiful temple. 4.5 miles might not seem so bad but this hike was STEEP! I got a great workout in. The views from the temple was a nice reward. Note, there is 1 temple along the way that's more in the woods. That's not Wat Pha Lat. Keep going. You can also drive up to this temple so you won't be the only one. Tons of tourists go here. https://www.alltrails.com/trail/thailand/chiang-mai/doi-suthep-monk-trail
This is their main market everyone talks about. I feel like you've gotta do this, especially if you're in town on a Sunday night. However, it definitely was not my favorite market. It's super, super crowded, or at least was when I was there. Tons of shopping vendors and food. Would definitely recommend, but I much preferred the smaller, slower-paced night markets.
Rent a scooter and do the Samoeng loop. Looking back, this was one of the coolest days spend in Chiang Mai. You can do the loop in like an hour if you just go straight. I stopped at view points, restaurants, and coffee shops along the way. This was my favorite viewpoint and is the header photo for this guide.